mkdep.c revision 1.6
1 /* $NetBSD: mkdep.c,v 1.6 2001/03/22 00:16:50 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matthias Scheler. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\n\ 42 All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 __RCSID("$NetBSD: mkdep.c,v 1.6 2001/03/22 00:16:50 cgd Exp $"); 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/wait.h> 51 52 #include <ctype.h> 53 #include <err.h> 54 #include <locale.h> 55 #include <paths.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #define DEFAULT_CC "cc" 62 #define DEFAULT_PATH _PATH_DEFPATH 63 #define DEFAULT_FILENAME ".depend" 64 65 static void usage __P((void)); 66 static char *findcc __P((const char *)); 67 int main __P((int, char **)); 68 69 static void 70 usage() 71 { 72 (void)fprintf(stderr, 73 "usage: %s [-a] [-p] [-f file] flags file ...\n", 74 getprogname()); 75 exit(EXIT_FAILURE); 76 } 77 78 static char * 79 findcc(progname) 80 const char *progname; 81 { 82 char *path, *dir, *next; 83 char buffer[MAXPATHLEN]; 84 85 if ((next = strchr(progname, ' ')) != NULL) { 86 *next = '\0'; 87 } 88 89 if (strchr(progname, '/') != NULL) 90 return access(progname, X_OK) ? NULL : strdup(progname); 91 92 if (((path = getenv("PATH")) == NULL) || 93 ((path = strdup(path)) == NULL)) 94 return NULL; 95 96 dir = path; 97 while (dir != NULL) { 98 if ((next = strchr(dir, ':')) != NULL) 99 *next++ = '\0'; 100 101 if (snprintf(buffer, sizeof(buffer), 102 "%s/%s", dir, progname) < sizeof(buffer)) { 103 if (!access(buffer, X_OK)) { 104 free(path); 105 return strdup(buffer); 106 } 107 } 108 dir = next; 109 } 110 111 free(path); 112 return NULL; 113 } 114 115 int 116 main(argc, argv) 117 int argc; 118 char **argv; 119 { 120 /* LINTED local definition of index */ 121 int aflag, pflag, index, tmpfd, status; 122 pid_t cpid, pid; 123 char *filename, *CC, *pathname, tmpfilename[MAXPATHLEN], **args; 124 const char *tmpdir; 125 /* LINTED local definition of tmpfile */ 126 FILE *tmpfile, *dependfile; 127 char buffer[32768]; 128 129 setlocale(LC_ALL, ""); 130 setprogname(argv[0]); 131 132 aflag = 0; 133 pflag = 0; 134 filename = DEFAULT_FILENAME; 135 for (index=1; index< argc; index++) 136 if (strcmp(argv[index], "-a") == 0) 137 aflag = 1; 138 else 139 if (strcmp(argv[index], "-f") == 0) { 140 if (++index < argc) 141 filename = argv[index]; 142 } 143 else 144 if (strcmp(argv[index], "-p") == 0) 145 pflag = 1; 146 else 147 break; 148 149 argc -= index; 150 argv += index; 151 if (argc == 0) 152 usage(); 153 154 if ((CC = getenv("CC")) == NULL) 155 CC = DEFAULT_CC; 156 if ((pathname = findcc(CC)) == NULL) 157 if (!setenv("PATH", DEFAULT_PATH, 1)) 158 pathname = findcc(CC); 159 if (pathname == NULL) { 160 (void)fprintf(stderr, "%s: %s: not found\n", getprogname(), CC); 161 return EXIT_FAILURE; 162 } 163 164 if ((args = malloc((argc + 3) * sizeof(char *))) == NULL) { 165 perror(getprogname()); 166 exit(EXIT_FAILURE); 167 } 168 args[0] = CC; 169 args[1] = "-M"; 170 (void)memcpy(&args[2], argv, (argc + 1) * sizeof(char *)); 171 172 if ((tmpdir = getenv("TMPDIR")) == NULL) 173 tmpdir = _PATH_TMP; 174 (void)snprintf(tmpfilename, sizeof (tmpfilename), "%s/%s", tmpdir, 175 "mkdepXXXXXX"); 176 if ((tmpfd = mkstemp (tmpfilename)) < 0) { 177 warn("unable to create temporary file %s", tmpfilename); 178 return EXIT_FAILURE; 179 } 180 181 switch (cpid = vfork()) { 182 case 0: 183 (void)dup2(tmpfd, STDOUT_FILENO); 184 (void)close(tmpfd); 185 186 (void)execv(pathname, args); 187 _exit(EXIT_FAILURE); 188 /* NOTREACHED */ 189 190 case -1: 191 (void)fprintf(stderr, "%s: unable to fork.\n", getprogname()); 192 (void)close(tmpfd); 193 (void)unlink(tmpfilename); 194 return EXIT_FAILURE; 195 } 196 197 while (((pid = wait(&status)) != cpid) && (pid >= 0)); 198 199 if (status) { 200 (void)fprintf(stderr, "%s: compile failed.\n", getprogname()); 201 (void)close(tmpfd); 202 (void)unlink(tmpfilename); 203 return EXIT_FAILURE; 204 } 205 206 (void)lseek(tmpfd, (off_t)0, SEEK_SET); 207 if ((tmpfile = fdopen(tmpfd, "r")) == NULL) { 208 (void)fprintf(stderr, 209 "%s: unable to read temporary file %s\n", 210 getprogname(), tmpfilename); 211 (void)close(tmpfd); 212 (void)unlink(tmpfilename); 213 return EXIT_FAILURE; 214 } 215 216 if ((dependfile = fopen(filename, aflag ? "a" : "w")) == NULL) { 217 (void)fprintf(stderr, "%s: unable to %s to file %s\n", 218 getprogname(), aflag ? "append" : "write", 219 filename); 220 (void)fclose(tmpfile); 221 (void)unlink(tmpfilename); 222 return EXIT_FAILURE; 223 } 224 225 while (fgets(buffer, sizeof(buffer), tmpfile) != NULL) { 226 char *ptr; 227 228 if (pflag && ((ptr = strstr(buffer, ".o")) != NULL)) { 229 char *colon; 230 231 colon = ptr + 2; 232 while (isspace(*colon)) colon++; 233 if (*colon == ':') 234 (void)strcpy(ptr, colon); 235 } 236 237 ptr = buffer; 238 while (*ptr) 239 if (isspace(*ptr++)) 240 if ((ptr[0] == '.') && (ptr[1] == '/')) 241 (void)strcpy(ptr, ptr + 2); 242 243 (void)fputs(buffer, dependfile); 244 } 245 246 (void)fclose(dependfile); 247 (void)fclose(tmpfile); 248 (void)unlink(tmpfilename); 249 250 return EXIT_SUCCESS; 251 } 252
Indexes created Fri Sep 26 08:10:20 GMT 2025